Valve-spring holder



"Jan, 24, 1928.

' 1,656,974 D. M. DORMAN VALVE SPRING HOLDER Filed Dec. 1'7. 1926llllllllllllll llllllil Inventor Attorney ,Derzrzz'e jjl armmw PatentedJan. 24, 1928.

llllll'ED STATES reins.

PATEN VALVE-SPRING HOLDER.

Application filed December 17, 1926. Serial No. 155,453.

This invention relates to an improved automotive accessory and'has moreparticular reference to an improved valve spring holder.

l. am aware, of course, that a multitude of different kinds oi devicesknown as valve litters and valve spring litters have been patented andmarketed for use in connection with internal combustion engine valvesfor maintaining the coiled springs in compressed condition to permitremoval of the spring cup retainer, and subsequent removal of the valveand stem for grinding of the valve seat. Most of these devices, however,co1nprise intricate tool structures made up of levers and linksfrequently so constructed as to render the same undependable anddiiticult to manipulate.

Briefly, the present invention relates to a one-piece body in the formof an open ended cylinder adapted to surround the lower end of the valvestem and the upper end of the valve push pin, the same being engaged atits upper end with the spring cup and at its lower end with the push pinguide. I am also aware that devices of this general character such asshown in Patent No. 1,113,258 to O. E. Stewart, October 18, 1924:, andNo. 1,185,241 to R. D- Radcliii', May 80, 1916, are old.

It follows that my primary aim is to improve upon valve spring littersof these gen eral types by providing one wherein the cylinder is formedon one side with finger notches to facilitate gripping and removal ofthe horse shoe or cotter pin such as is used on the valve stem forholding the cup in place.

Another feature is in having the lower end of the cylinder constructedin a manner to fit snugly down and over the push pin guide to preventaccidental displacement of the device and consequent displacement of thevalve spring.

Other features and advantages of the invention will become apparent fromthe following description and drawing.

.ln the accompanying drawings forming a part or this application and inwhich like numerals are employed to designate like parts throughout thesame:

Figure 1 is a fragmentary sectional and elevational view of a portion ofan internal combustion engine valve structure showing the improved valvespring holder associated therewith.

provided with a central stem 2 extending down through a guide 8 in thecylinder block, which is also provided with a Valve seat 1. The crankcase is represented at 5-, and rotatable in this is a cam shaft 6 havinga cum '5' engaging the lower end of the push pin or tappct rod 8. Thisextends up through a bored protuberance 9 functioning as a guide. Theusual valve spring 10 surrouncs the stem and rests in an ordinary cup 11held in place by a horse shoe retainer 12. 01 course, all of these partsare of conventional form and constitute no part of the invention, beingshown merely for the purpose of demonstration oi the operation of theinvention.

The invention is generally represented by the reference character 18 andas before stated it is in the form of a single body ofgeneralcylindrical form represented at 14;. This is open at its oppositeends, and one side is cut away and the edges thereof are formed withcurved finger notches 15 which, obviously, serve to permit removal ofthe horse shoe retainer 12 as represented in Figure 2. l. havedesignated a portion 16 as a web and wish to call attention to the factthat this serves to surround the guide 9 as shown in Figure 2 and to beammed tightly down over the same in telescoping relation to preventdisplacement oi the device.

In operation, the cam shaft 6 is so turned as to elevate the valve 1 oilor" the seat 4 as represented in Figure 1, thus compressing the spring10. Thisspaces the valve stem from the push rod in an obvious manner,thus aiiording sufiicient space to permit the relatively thin gage metalcylinder to be passed therebetween and then set in an up right positionbetween the guide 9 and the under side of the valve spring cup 11. Nowthe valve may be lowered so as to bring the horse shoe down opposite thefinger notches to permit it to be removed and to permit subsequentremoval of the valve and its stem.

Even after the valve is removed the spring is maintained in compressedcondition so as to pei'n'iit ellleient. i'esuit'aeing of the valve seat.

It to he stated that the only difference hctween Figure 3 and the otherfigure is that a more modern type of tappet pin guide is FliOWlL thesame being in the form of a reinoi'ahle hashing. In this instance thedevice heats down on the top flange of the bushing.

It is helieied that by considering the de- Ft'llpllitm in connectionwith the drawing a idea!- understanding of the invent on will be had. ihei' itoi'e, a more lengthy (ltRtliPtiOH thought unnecessary.

lVhile the preferred en'ihodiinent. of the invention has been shown anddesei'iliied, it is to he understood that minor changes in Phone andsize, may he resorted to without departing from the spirit of theiHYLHtiOU as claimed.

lilaving thus described the ii'iventicm, what I claim is:

As a new product 0 1' nnmntaetnie, a valve spring litter of the class(ileserihed comprising an open ended eylindei' having" the major part ofone side cut away to provide an entrance, the opposite edges of theentrance being formed with finger notches-1, and the lower portion ofsaid Cyllntltlt lining in C0111 plete e x 'lindi' eal town to permit; itto he teie' retipltttlly e iigag't-d with a valve pneh pin guide.

iii) NNT I i M. DURIJA

